Rotary mulching mower

• US 4,205,512 A
• Filed: 08/04/1978
• Issued: 06/03/1980
• Est. Priority Date: 08/04/1978
• Status: Expired due to Term

• Current Assignee: Toro Company (Toro)
• Original Assignee: Toro Company (Toro)
• Inventors: Thorud, Richard A.
• Primary Examiner(s): Kinsey, Russell R.
• Application Number:
  US05/931,267
• Time in Patent Office: 669 Days
• Field of Search: 56/320.1, 56/255, 56/17.5, 56/12.7, 56/13.4
• US Class Current: 56/13.4
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/005 Mulching means

Abstract

A rotary mulching mower having a housing which defines a cutting chamber and has a kicker mounted therein to direct grass clippings generally downward into the cutting path. A cutting blade is mounted to the housing and disposed within the cutting chamber for rotation about a generally vertical axis. The cutting chamber is generally cylindrical and in the preferred embodiment a plurality of kickers are mounted within the chamber and spaced apart about its circumference. The mower has a central deck that encloses the cutting chamber and a rear deck with vertical sidewalls that taper rearwardly from the central deck to a rear wall.

Claims

1. A rotary mulching mower comprising:

(a) a housing defining a cutting chamber, said housing having ground engaging wheels rotatably affixed thereto for supporting said housing above the ground surface;

(b) a cutting blade disposed within said cutting chamber for rotation about a generally vertical axis, said cutting blade defining a generally horizontal cutting path;

(c) means mounted on said housing and connected to said cutting blade for rotatably driving said cutting blade; and

(d) a kicker member mounted to said housing within said cutting chamber said kicker member having a striking surface lying generally in a plane oblique with respect to said generally horizontal cutting path, and disposed in the path of grass clippings to deflect the clippings generally downwardly into said cutting path;

whereby the clippings are deposited beneath the surface of the grass.

2. A rotary mulching mower in accordance with claim 1 wherein said housing has a top wall on which said driving means is mounted and generally vertically extending sidewalls, and wherein said kicker comprises a planar plate member positioned within said cutting chamber above a plane in which said generally horizontal cutting path lies.

3. A rotary mulching mower in accordance with claim 2 wherein said planar member is angularly disposed with respect to said vertically extending sidewalls of said housing.

4. A rotary mulching mower in accordance with claim 3 wherein said planar member extends generally inwardly with respect to the rotational axis of said cutting blade and forwardly with respect to the direction of rotation of said cutting blade.

5. A rotary mulching mower comprising:

(a) a housing with ground engaging wheels rotatably mounted thereto, said housing further comprising;

(i) a central deck member defining a generally cylindrical cutting chamber, said central deck member having a bottom edge disposed above the ground surface and about which air is ingested into said cutting chamber, said bottom edge defining a plane sloping downwardly and forwardly with respect to a forward direction of movement of the mower;

(ii) a rear deck member extending from said central deck member and having vertically disposed sidewalls that taper upwardly from said bottom edge of said central deck member to a rear wall;

(b) a cutting blade disposed within said cutting chamber for rotation about a substantially vertical axis, said cutting blade defining a generally horizontal cutting path; and

(c) means mounted atop said central deck member and connected to said cutting blade for rotatably driving said cutting blade.

6. A rotary mulching mower in accordance with claim 5 comprising a kicker mounted to said housing within said cutting chamber and disposed in the path of grass clippings to direct the clippings generally downward into the cutting path of said blade.

7. A rotary mulching mower in accordance with claim 6 wherein said central deck member has a top wall on which is mounted said driving means and downwardly extending sidewalls, and wherein said kicker is a planar plate member positioned vertically above said horizontal cutting path and lying in a plane disposed at an angle with respect to said sidewalls.

8. A rotary mulching mower in accordance with claim 7 wherein said planar member is affixed to said sidewall and extends upward toward said topwall and inward with respect to the rotational axis of said cutting blade.

9. A rotary mulching mower comprising:

(a) a deep deck housing defining a cutting chamber, said housing having ground engaging wheels rotatably affixed thereto for supporting said housing above the ground surface;

(b) a cutting blade disposed within said cutting chamber for rotation about a generally vertical axis, said cutting blade defining a generally horizontal cutting path;

(c) means mounted on said housing and connected to said cutting blade for rotationally driving said cutting blade; and

(d) a plurality of generally planar kickers mounted to said housing within said cutting chamber and disposed circumferentially about said cutting path and in the path of grass clippings, said kickers mounted obliquely with respect to said generally horizontal cutting path and sloping downwardly, inwardly toward said generally vertical axis, and forwardly with respect to the direction of rotation of said cutting path to deflect clippings generally downward and inward into the cutting path of said blade.

10. A rotary mulching mower in accordance with claim 9 wherein said housing comprises a top wall on which is mounted said driving means and a vertically extending sidewall, and wherein said plurality of kickers comprises first and second planar plate members affixed to said sidewall and angularly spaced apart about the circumference of said cutting chamber, said planar plate members vertically disposed above the horizontal cutting path of said blade.

11. A rotary mulching mower in accordance with claim 10 wherein said housing has a central deck portion that defines said cutting chamber and a rear deck portion extending from said central deck portion, said rear deck portion having generally vertically disposed side walls that taper upwardly from the bottom edge of said central deck portion to a rear wall of said rear deck portion.

12. A rotary mulching mower in accordance with claim 11 wherein said first and second planar plate members extend upwardly towards said topwall of said housing and inwardly towards said vertical rotational axis of said blade.

13. A rotary mulching mower in accordance with claim 12 wherein said cutting blade comprises an elongated planar member having sail portions extending generally upward toward said top wall of said housing, said sail portions defining a striking surface to establish a circular flow of clippings within said housing.

14. A rotary mulching mower in accordance with claim 13 wherein said vertically extending side wall includes a front enclosure member and a right side portion with respect to a forward direction of movement of the mower, and wherein said first kicker is mounted to said front enclosure member and said second kicker is mounted to said right side portion.